Originally Posted by
Pilot DAR
Probably yes, too much aerodynamic load, combined with vibration, which was not symmetrical. That also begins to overload the TR gearbox attachment and mechanisms.
Interesting. But that has not been my experience picking up the pieces after a failure. If one blade fails individually the out of balance will usually fail the t/boom structure and the gearbox and remaining blade depart. In this case both blades failed almost simultaneously which left the GB in place....
I understand that the 222 TR is a teeter hub just like the 206's.
Yes. But that is the only thing similar. The 222 also has a TR swashplate with "Chinese weights" to keep the blades inline. While some have noted a possible PC link loose those items are not very substantial or heavy. However, if the TR control input bellcrank or control rod failed and the item seen in the pics spinning around is part of the sw/plate then I can see a lot of localized damage occurring in the area where both blades failed. It may also account for why only the TR output quill departed leaving the main TR GB still installed.